Screen.



lHElil'RIY W. WATSON AND WILLIAM W. WATSDN, 0F JAMESTOWN, NEW YORK.

SCREEN.

Specicatonof Letters Patent. Patented pl'. 26, 1914).

Application led April 20, 1908. Serial No. 427,998.

To (IZA whom it may concern:

Beit known that we, HENRY W. VATSON and lViLLIAM lV. lVA'rsoN, citizens of the United States, and residents of Jamestown, inthe county of Chautauqua and State of New York, .have invented 'new and useful Improvements in Screens, of' which the following, taken, in'connection with the accompanying drawings, is a full, clear, and exact description.'

The invention relates to improvements in screen doors, window screens, etc., and the object of ourA improvement is to provide a more perfect means forfattaching the screen fabric on to the supporting frame. r Thek attachment of the screen wire or fabric to the frame by means of a locking strip and groove has been well known for years. l.The diiiicultyin so attaching the screen" fabric has been the liability to split the frame side through the attaching groove on account of the wedging strain of the lockingl strip and the pullof the screen fabric. `Our invention entirely overcomes this diiiiculty by giving increased strength to the frame side and a suiiiciently strong attachment. for,` the fabric thereto to hold each strand yet so adjusts the strain ofthe attachment of the screen fabric to the strength ofthe frame side that the fabric will give way atsaid point of attachment before rupturing either the frame side or the screen fabric. `The screen fabric can then be reattachcd, but when the supporting frame is ruptured the.' entire screen is ruined.

"In the drawings, Figure 1 is a sectional view of a screen. frame showing the screen fabric :littached vto` the frame in our improved manner 'with the outwardly extend CIK ing groove in the rear wall oftherecess. Fig. 2 is a sectional View of the screen frame showing the fabric attached to the frame with the attaching groove partly in veach of the rear and bottom walls of the recess, and

also our method or holding a grille alongside of the fabric. Fig.- 3 is a perspective view of the screen frame showing the groove and the lock strip therein holding the screen fabric in place and the molding covering the same broken away so as to show the arrangement of the parts. Fig. 4 is a sectional view of a' screen frame showing our improved construction in which the outwardly extending groove isentirely in the bottom wall of the recess.

Similar numerals refer to corresponding parts in the several views.

The numeral l indicates the screen frame the inner angle of the recess k11 a length` wise groove 13 is provided which extends from said recess at an outward angle 1n comparison with the bottom and rear 'wal-ls of said recess or away from the inner ed e of the frame side. lVhen partly in each of t rese walls and extending out from the corner,

asshown in' Fig. Q, the sides of the groove 1-3 will -be-at an obtuse angle from the ach jacent- .recess wall. The purpose 'of this outward angle is ,to leave the frame side as strong as possible and also particularly in narrow recesses to remove it as far as possible, from the inner edge of the screen frame, in order to render the frame side as strong as possible against splitting strain. The inner edge 1G of the fabric 12 is attached to the frame sides by means of a lock strip 14 which tits tightly within groove 13, .being driven into' the groove and thereby meshing on to the fabric' and pressing the same into the sides of the groove so as to hold each strand of the fabric firmly in place. The recess 11 is filled by a cover strip or molding l5 whichis principally for ornamentation but may aid to some extent in holding the fabric. The fabric would -be held firmly in place by the lock strip 14 without the aid of cover strip 15. The inner crner 18 of the cover strip 15 preferably presses against the lock strip 14, as 4shown in Fig. 1 though it may be entirely separated from said lock strip, as shown inFigs 2 and t. The out-ward or` obtuse angle and placing ofthe groove 13l and lock `strip 14 allow of the holding nails 19 for cover strip 15, being driven at an outward angle through the lock strip and into the main outer portion of the frame side thereby allowing of the use of a much longer nail. The passage of the nail through the lock strip 14C also absolutely prevents its turning in the groove from the pull of the fabric. It is apparent that this outward `angle of the groove 13 gives a large increase in the amount of the frame side beneath the saine or between said groove and the opposite side of the frame, even in the thin stock lused for light screens, ,as shown in Fig. 2. It is also at such a distance from the inner edge of the screen side as to make it practically impossible to split the frame side by either the wedging action of the lock strip 14 into the groove 13, or the pull of the fabric on the frame, or the driving of the nails into the frame. This attaching groove has heretofore been made in the bottom of the recess with perpendicular sides, as shown at 24 in dotted line in Fig. 3, and it is apparent that such a construction greatly weakens the frame side, rendering it liable to split from the wedging strain of the lock strip or the pull of the wire. It is apparent also that it would be practically impossible to drive the nails through the lock strip i'n this former position without endangering the splitting of the frame side. The outward angle of the attaching groove entirely overcornes all these faults and allows the nails to be'driven through the lock strip and into the main portion of the frame side.

Heretofore the'method of attachment of the screen fabric,-which is usually made of wire, was much stronger than the frame side itself or the fabric. Our purposeis to s0 balance the method of attachment of the screen fabric to the frame side that an eXtra strain upon the fabric will b e more liable to detach the fabric from the frame than to split or break the frame or tear the fabric. Should the fabric be detached it can be reattached but when the frame side is s lit the screen is ruined. This increased iability of detachment for the screen fabric is attained in our improved construction by means of the obtuse angle 23 over which the screen fabric 12 bends as it passes down into groove 13 and around strip 14, as compared with the right angle 24 of the old style perpendicular groove, as shown in Fig. 3. It is obvious that the old style perpendicular groove with its ri ht angle sides held the screen fabric abso utely so that in case of strain the frame side itself had to give way or rupture the fabric. The obtuse angularll side 23 of groeve 13 holds the screen fabric, 12 suiiicicntlyl strong for all practical screen purposes and it is apparent that a heavy blow upon the screen cloth will cause the screen fabric to pull over the obtuse angle and detach the ed e of the screen fabric from the frame side l0. This detached edge of the screen fabric can afterward be easily reattached without great detriment to the screen.

The lower side of the strip 15 is preferably cut away as shown at 2U,.except a short distance from the inner edge thereof wherein the cover strip l5 is in perfect contact with the screen wire and frame side thereby holding the screen fabric lirrnly in place. The cutting of the rear portion 20 of the lower side of the cover strip also insures the perfect litting of the cover strip within the recess 11, since the contact is only made against the frame side at the point 2l and at the rear angle 22. Thus warped `or unevenly cut cover strips may be drawn perfectly into contact, insuring the 4perfect holding of the screen Wire.

When it is desired to insert a grille 17 the lower side of the tie strip 15 is preferably cut away instead of the frame side since it is desirable not to weaken the frame side even by the necessary amount for inserting the grille.

We claim as new `A screen for doors, windows and the like, comprising a1 frame having a lengthwise rabbet with its walls at right angles on its inner edge, said 'frame being further formed with a lengthwise groove at the corner of the rabbet, which groove has its sides extending at an outward angle to the rabbeted recess, screen fabric disposed to lie in said rabbeted recess and said lengthwise groove, a lock strip engaving the screen fabric and received in said -engthwise groove, and a cover strip conformably received in said rabbeted recess and having its inner corner shaped to engage said lockistrip to hold saine in said lengthwise groove.

ln testimony whereof we have signed our naines to this specification in the presence of two subscribing witnesses.

HENRY W. WATSON. WILLIAM WV. WATSON. Witnesses:

I. A. ELLSWORTH, A. W. KEriLE. 

